package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDate;
import java.time.LocalDateTime;

/**
 * 自定义切面，实现公共字段自动填充
 */
@Aspect
@Slf4j
@Component
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPoinCut(){
    }

    @Before("autoFillPoinCut()")
    public void autoFill(JoinPoint joinPoint){
        System.out.println("自动填充");
        //获取当前被拦截的方法上的数据库操作类型
        MethodSignature signature =(MethodSignature) joinPoint.getSignature();
        AutoFill annotation = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = annotation.value();

        //获取到当前被拦截的方法的参数 -- 实体对象

        Object[] args = joinPoint.getArgs();
        if (args == null && args.length == 0){
            return;
        }
        Object entity = args[0];

        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();
        
        if(value == OperationType.INSERT) {
            try {
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                setCreateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }

        } else if (value == OperationType.UPDATE) {

            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);


                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);

            } catch (Exception e) {
                e.printStackTrace();
            }


        }
    }
}
